package lambda.string;

public class StringBuilderDemo2 {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder("a");
        for (int i = 0; i <10000000 ; i++) {
            sb.append("a");
            
        }
        System.out.println("执行完毕");
        System.out.println(sb.length());
    }


}
